While President Obama was paying his respects in New York, his second-in-command presided over a brief but solemn ceremony outside the Pentagon, honoring the 184 people who were killed there on 9/11.

Vice President Biden placed a large wreath of white lilies and carnations — woven with red-white-and-blue ribbons — in front of a blackened stone where American Airlines Flight 77, hijacked by terrorists, crashed into the base of the Pentagon.

After a military bugler played taps, Biden made no remarks but shook hands with first responders from the Arlington County Fire Department.